Borg Mechanical Digital BL5101 - Knob Keypad Back-to-Back - Satin Chrome and Satin Stainless
At A Glance
At A Glance
FINISHESSatin Chrome / Satin Stainless
DISPATCHSpecial Order - Call Us
PIN Code (Both Sides) 
No Key Override 
No AppThe Borg BL5101 is a fully mechanical digital lock in a knob/knob back-to-back (BTB) configuration. Both sides of the door have an identical knob keypad - enter the code and rotate the knob to retract the latch. Each keypad has an independent coding chamber, so each side can be set to a different PIN or both sides can share the same code. The operating experience is symmetric and identical from each direction. No free inside egress - code required from both sides. No key override. Fire rated to AS 1905.1-2005 (up to 4 hours doorset dependent). Fully mechanical - no batteries, ever.
The knob format on both sides makes this the most compact BTB configuration in the BL5000 series. Knob handles have a significantly smaller radial projection from the door face than lever handles (75mm vs 89mm depth), making the BL5101 the right choice where lever handles would protrude into walls, frames, adjacent furniture, or create a clearance problem in a tight corridor. Available in Satin Chrome (BL5101SC) and Satin Stainless (BL5101SS) - both for internal and sheltered external use.
This is the non-ECP tumbler version of the BL5101. Code change requires removing the keypad from the door and repositioning tumblers with tweezers. If on-door code change (Easicode Pro) is required in a knob/knob back-to-back format, see our BL5151SC (hybrid knob/lever with tumbler) or contact Terry's for ECP alternatives. This product sits in the Digital Mechanical Locks category.
Special Order
Call or email Terry's Locksmiths for estimated dispatch times and stock availability before ordering. We can confirm lead times and arrange supply.
Call or email Terry's Locksmiths for estimated dispatch times and stock availability before ordering. We can confirm lead times and arrange supply.
Knob Keypad Both Sides - Symmetric Compact Operation
The BL5101 has an identical knob keypad on both sides of the door. Both sides are functionally identical: enter the code on the keypad, then rotate the knob to retract the latch. This gives the most compact profile of any BTB configuration in the BL5000 range - knobs project only 75mm from the door face compared to 89mm for lever handles. Useful for tight clearances beside walls, partitions, or fixtures. See our guide to double-sided mechanical digital locks.
The BL5101 has an identical knob keypad on both sides of the door. Both sides are functionally identical: enter the code on the keypad, then rotate the knob to retract the latch. This gives the most compact profile of any BTB configuration in the BL5000 range - knobs project only 75mm from the door face compared to 89mm for lever handles. Useful for tight clearances beside walls, partitions, or fixtures. See our guide to double-sided mechanical digital locks.
Independent Coding Chambers - Different Codes Each Side (Optional)
Each knob keypad has its own independent coding chamber and tumbler set. Both sides can share the same code for simplicity, or each side can be set to a completely different PIN. A user on one side has no way to determine the code in use on the other side's chamber. Codes are changed per side separately using the bench tumbler method. See the bench code change guide.
Each knob keypad has its own independent coding chamber and tumbler set. Both sides can share the same code for simplicity, or each side can be set to a completely different PIN. A user on one side has no way to determine the code in use on the other side's chamber. Codes are changed per side separately using the bench tumbler method. See the bench code change guide.
Code Required to Exit - No Free Egress from Either Side
Both knob keypads require the correct PIN before the knob retracts the latch. There is no free-turning inside knob and no key override. Confirm this suits your application and complies with any applicable fire egress, emergency exit, or building code requirements. If free inside egress is required, see the BL5001 (single-sided with free inside egress). See our exit path requirements guide.
Both knob keypads require the correct PIN before the knob retracts the latch. There is no free-turning inside knob and no key override. Confirm this suits your application and complies with any applicable fire egress, emergency exit, or building code requirements. If free inside egress is required, see the BL5001 (single-sided with free inside egress). See our exit path requirements guide.
Fire Rated - AS 1905.1-2005
Successfully tested for use on fire door assemblies in accordance with AS 1905.1-2005 Fire Resistant Doorsets, up to 4 hours depending on doorset. When specifying on a fire door, confirm all other hardware is also fire rated and that the BTB code-to-exit configuration is permissible for the specific occupancy and doorset certification. See our fire door certification guide and Fire Door Locks category.
Successfully tested for use on fire door assemblies in accordance with AS 1905.1-2005 Fire Resistant Doorsets, up to 4 hours depending on doorset. When specifying on a fire door, confirm all other hardware is also fire rated and that the BTB code-to-exit configuration is permissible for the specific occupancy and doorset certification. See our fire door certification guide and Fire Door Locks category.
Code Change Requires Removing the Keypad - Bench Tumbler Method
This is the non-ECP tumbler version. To change the PIN on either side: remove the 4 red screws, carefully lift the cover plate (springs are attached), hold the C tumbler depressed throughout, then use the supplied tweezers to reposition the red (coded) and blue (uncoded) tumblers. All tumbler square cut-outs must face outward; coloured marks must face upward. Code length adjustable from 3 to 7 digits. Each side is changed independently. Read Borg standard chamber notes and bench code change traps before your first code change.
This is the non-ECP tumbler version. To change the PIN on either side: remove the 4 red screws, carefully lift the cover plate (springs are attached), hold the C tumbler depressed throughout, then use the supplied tweezers to reposition the red (coded) and blue (uncoded) tumblers. All tumbler square cut-outs must face outward; coloured marks must face upward. Code length adjustable from 3 to 7 digits. Each side is changed independently. Read Borg standard chamber notes and bench code change traps before your first code change.
Note: An ECP (Easicode Pro) Version of the BL5101 Also Exists
Borg produces a BL5101 ECP variant with on-door code change, 100k+ cycle testing, and a code change disabling plug. This is a different product to the BL5101SC/SS on this page. The ECP variant is not currently stocked by Gold Coast Smart Locks as a separate listing. If you require on-door code change in a knob/knob back-to-back format, contact Terry's to discuss availability, or consider the BL5151SC (knob/lever hybrid with bench tumbler code change).
Borg produces a BL5101 ECP variant with on-door code change, 100k+ cycle testing, and a code change disabling plug. This is a different product to the BL5101SC/SS on this page. The ECP variant is not currently stocked by Gold Coast Smart Locks as a separate listing. If you require on-door code change in a knob/knob back-to-back format, contact Terry's to discuss availability, or consider the BL5151SC (knob/lever hybrid with bench tumbler code change).
Free Passage Function (F Button) - Independent Per Side
Enter the correct code on one side and rotate the knob, then press F to engage free passage on that side. The knob becomes free-turning without code entry. To exit free passage: rotate the knob and press C until an audible click is heard. Each side is independent - engaging it on one side does not affect the other. Permanently deactivatable with the included plug. See passage mode explained.
Enter the correct code on one side and rotate the knob, then press F to engage free passage on that side. The knob becomes free-turning without code entry. To exit free passage: rotate the knob and press C until an audible click is heard. Each side is independent - engaging it on one side does not affect the other. Permanently deactivatable with the included plug. See passage mode explained.
Fully Mechanical - No Batteries Required, Ever
The BL5101 is entirely mechanical on both sides. No power source, no wiring, no battery compartment anywhere in the lock. See how mechanical digital locks work.
The BL5101 is entirely mechanical on both sides. No power source, no wiring, no battery compartment anywhere in the lock. See how mechanical digital locks work.
Designed for light to medium usage areas
Tight-clearance internal doors, meeting rooms, server rooms, storerooms, and amenity doors where compact both-sided code access is required.
Tight-clearance internal doors, meeting rooms, server rooms, storerooms, and amenity doors where compact both-sided code access is required.
Not suitable for high traffic commercial use
For heavy duty both-sided access: see the Carbine CDL7200LL-KDSC-HD or heavy duty commercial guide.
For heavy duty both-sided access: see the Carbine CDL7200LL-KDSC-HD or heavy duty commercial guide.
Single PIN Code Only Per Side
Each knob keypad holds one active PIN code at a time. Each side can hold a different code independently. No multiple-user database, no audit trail. See the limitations of mechanical digital locks.
Each knob keypad holds one active PIN code at a time. Each side can hold a different code independently. No multiple-user database, no audit trail. See the limitations of mechanical digital locks.
Key Features
- Knob keypad on both sides - identical, symmetric operation from each direction. Most compact BTB option in the BL5000 range.
- 75mm overall depth on keypad side vs 89mm for lever units - smaller radial projection suits tight clearance applications.
- Independent coding chambers per side - each side can be set to a different code, or both can share the same code.
- Code required from both sides - no free egress from inside. No key override.
- Free passage function (F button) - independent per side; permanently deactivatable with supplied plug.
- Tumbler code system - over 1,000 combinations per side; code length adjustable from 3 to 7 digits using spare tumblers supplied.
- Fire rated to AS 1905.1-2005 (up to 4 hours depending on doorset).
- Fully mechanical - no batteries, no wiring, no electronics anywhere in the lock.
- Clutch protection on both knobs - knob free-spins until the correct code is entered.
- 8mm square drive spindle - compatible with most leading lock brands and standard Australian door preparations.
- 60mm backset heavy duty anti-thrust tubular latch (12.5mm latch bolt) - 70mm available separately.
- Door thickness 35mm to 54mm (standard fixings supplied).
- Reversible on site for left or right hand doors.
- BL5101SC - satin chrome (PVD); internal and sheltered external use.
- BL5101SS - satin stainless (PVD); internal and sheltered external use.
Access Methods
Free Inside Egress
What's in the Box
Borg BL5000 Series non-ECP accessories packs - all parts supplied with BL5101SC / BL5101SS
- Borg BL5101 outside knob keypad assembly (selected finish)
- Borg BL5101 inside knob keypad assembly (selected finish)
- 60mm heavy duty anti-thrust tubular latch (12.5mm latch bolt)
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- 4 x 16mm screws
- 2 x M4 x 40mm screws
- 2 x M4 x 50mm screws
- 2 x M4 x 60mm screws
- 2 x coded tumblers (red - for code length adjustment)
- 2 x non-coded tumblers (blue - for code length adjustment)
- 1 x tweezers (for tumbler code change)
- 1 x long hex wrench (Allen key)
- 2 x handle screw rubber grommets
- Installation instructions
60mm anti-thrust stainless steel tubular latch (12.5mm latch bolt) - included with both finishes
A 70mm backset latch (BLL500070) is available separately. No batteries, wiring, or electronic components are included or required.
Suitable Uses
- Internal doors where both-sided code access is required and lever handles would create a clearance or projection problem - the knob's 75mm projection vs lever's 89mm is a meaningful difference where clearance is limited
- Tight corridors, office pods, and partitioned spaces where doors open close to walls, adjacent fixtures, or furniture
- Meeting rooms, server rooms, storerooms, and amenity doors requiring compact, symmetric both-sided code access control. See Internal Office and Commercial Doors
- Applications where each direction of access is managed by a different user group with their own independent code
- Fire-rated internal door assemblies requiring compact both-sided code access control - confirm code-to-exit from inside complies with egress requirements for the specific doorset
- Applications where symmetric, identical operation from each side simplifies user training and removes ambiguity about which side they are on
Available Finish Options
Satin Chrome
(This Product)
BL5101SC
Satin Stainless
(This Product)
BL5101SS
Both finishes are on this listing. BL5101SC is satin chrome (PVD); BL5101SS is satin stainless (PVD). Both are for internal and sheltered external use only. Neither finish is suitable for coastal or saline environments.
BL5100 / BL5000 Back-to-Back Family
Accessories and Spare Parts
Spare coded (red) and non-coded (blue) tumblers are included with the lock. Additional tumblers and spare tweezers can be sourced through Terry's Locksmiths. See spare tumbler guide and spares overview.
Full Specifications
Dimensions
External keypad: 48mm W x 177mm H; 75mm depth (door face to knob end); 26mm door-face projection; 59mm knob width. Inside knob handle: 48mm W x 177mm H; 37mm depth; 18mm door-face projection; 59mm knob width.
BL5101 - external keypad and inside knob handle dimensional drawing (legacy)
Frequently Asked Questions
Why choose knob/knob (BL5101) over lever/lever (BL5051)?
The BL5101 knob keypads project only 75mm from the door face; the BL5051 lever keypads project 89mm. In tight corridors or spaces where doors open close to a wall, partition, or adjacent fixture, the 14mm difference in projection is often the deciding factor. If clearance is not an issue, the BL5051 lever/lever is generally preferred for ergonomic reasons - levers are easier to grip and operate, particularly for users with limited hand strength. The BL5101 is the correct choice only when clearance is a real constraint. Both locks are otherwise functionally equivalent. Compare in the Item Code Family table.
The BL5101 knob keypads project only 75mm from the door face; the BL5051 lever keypads project 89mm. In tight corridors or spaces where doors open close to a wall, partition, or adjacent fixture, the 14mm difference in projection is often the deciding factor. If clearance is not an issue, the BL5051 lever/lever is generally preferred for ergonomic reasons - levers are easier to grip and operate, particularly for users with limited hand strength. The BL5101 is the correct choice only when clearance is a real constraint. Both locks are otherwise functionally equivalent. Compare in the Item Code Family table.
How do I change the PIN code, and how difficult is it?
The keypad must be removed from the door to change the code. Remove the 4 red screws, carefully lift the cover plate (springs attached), hold the C tumbler depressed at all times, then use the supplied tweezers to reposition the red (coded) and blue (uncoded) tumblers. Each side is changed independently. Allow 20-30 minutes per side on first attempt; 5-10 minutes once practiced. Always set and test codes on the bench before installing the lock on the door. Full procedure and traps at Borg standard chamber code change.
The keypad must be removed from the door to change the code. Remove the 4 red screws, carefully lift the cover plate (springs attached), hold the C tumbler depressed at all times, then use the supplied tweezers to reposition the red (coded) and blue (uncoded) tumblers. Each side is changed independently. Allow 20-30 minutes per side on first attempt; 5-10 minutes once practiced. Always set and test codes on the bench before installing the lock on the door. Full procedure and traps at Borg standard chamber code change.
What is the difference between BL5101SC and BL5101SS?
Both are identical in specifications, operating mechanism, fire rating, and dimensions. The only difference is finish: BL5101SC has a satin chrome (PVD) finish; BL5101SS has a satin stainless (PVD) finish. Neither is suitable for coastal or saline environments. Choose the finish that best complements your existing door hardware and interior aesthetic. Both are for internal and sheltered external use.
Both are identical in specifications, operating mechanism, fire rating, and dimensions. The only difference is finish: BL5101SC has a satin chrome (PVD) finish; BL5101SS has a satin stainless (PVD) finish. Neither is suitable for coastal or saline environments. Choose the finish that best complements your existing door hardware and interior aesthetic. Both are for internal and sheltered external use.
Is this lock fire rated, and can it be used on a fire escape route?
Yes, the BL5101 is fire rated to AS 1905.1-2005 (up to 4 hours doorset dependent). However, both sides require code entry - there is no free-turning knob from inside. On designated escape routes, NCC 2022 Clause D3D26 generally requires doors to be openable from inside without a key or special knowledge. A lock requiring code entry on the inside face would typically not satisfy this on an egress route. Confirm with your fire door certifier or building surveyor before specifying on a fire door serving as an escape route. See our exit path requirements guide.
Yes, the BL5101 is fire rated to AS 1905.1-2005 (up to 4 hours doorset dependent). However, both sides require code entry - there is no free-turning knob from inside. On designated escape routes, NCC 2022 Clause D3D26 generally requires doors to be openable from inside without a key or special knowledge. A lock requiring code entry on the inside face would typically not satisfy this on an egress route. Confirm with your fire door certifier or building surveyor before specifying on a fire door serving as an escape route. See our exit path requirements guide.
Can each side have a different code?
Yes. Each knob keypad has its own independent coding chamber. Change the tumblers on each side separately using the bench method to set different codes. Alternatively, set both chambers to the same tumbler configuration to use the same code on both sides. The operating experience is identical from each side regardless. See the benefits of double-sided locks with independent codes.
Yes. Each knob keypad has its own independent coding chamber. Change the tumblers on each side separately using the bench method to set different codes. Alternatively, set both chambers to the same tumbler configuration to use the same code on both sides. The operating experience is identical from each side regardless. See the benefits of double-sided locks with independent codes.
Additional Information
Set and Test Both Side Codes on the Bench Before Installation
Set and verify both side codes on the bench before fitting the lock to the door. Set the outside knob keypad, test it at least five times. Set the inside knob keypad, test it at least five times. Only then fit both sides to the door. This avoids having to remove a fitted keypad for the first code change. See common bench code change traps.
Set and verify both side codes on the bench before fitting the lock to the door. Set the outside knob keypad, test it at least five times. Set the inside knob keypad, test it at least five times. Only then fit both sides to the door. This avoids having to remove a fitted keypad for the first code change. See common bench code change traps.
Spindle Selection - Use the Longest That Fits
Two spindles are supplied (80mm and 90mm). Door thickness + 30mm = minimum spindle length (each knob keypad needs 15mm of spindle engagement). For a 45mm door, 80mm minimum. Do not cut spindles shorter than necessary. A spindle that is too short may disengage under a hard door slam, locking users out from both sides simultaneously - a more serious consequence than with a single-sided lock. Always verify spindle seating before closing the door.
Two spindles are supplied (80mm and 90mm). Door thickness + 30mm = minimum spindle length (each knob keypad needs 15mm of spindle engagement). For a 45mm door, 80mm minimum. Do not cut spindles shorter than necessary. A spindle that is too short may disengage under a hard door slam, locking users out from both sides simultaneously - a more serious consequence than with a single-sided lock. Always verify spindle seating before closing the door.
Lockout Risk - No Key Override and No Free Egress from Either Side
If the code is forgotten on both sides and free passage is not engaged, a locksmith is required for access. Both sides require code entry, so there is no way to re-enter from either side without the correct code or a locksmith. Always maintain a written record of the code for each side in a secure location. Consider engaging free passage during regular business hours on the primary access side to reduce lockout risk. Compare to the BL5701 (single-sided with integrated key override) if key override is a requirement.
If the code is forgotten on both sides and free passage is not engaged, a locksmith is required for access. Both sides require code entry, so there is no way to re-enter from either side without the correct code or a locksmith. Always maintain a written record of the code for each side in a secure location. Consider engaging free passage during regular business hours on the primary access side to reduce lockout risk. Compare to the BL5701 (single-sided with integrated key override) if key override is a requirement.
Non-Sequential Codes - Any Button Press Order Works
The mechanical coding chamber is non-sequential - the buttons can be pressed in any order. Code 1234 works the same as 4321, 2143, or any other order. This is a feature that prevents code-spying by watching button press sequence. It also means double-pressing the same button adds nothing. When setting a code, choose buttons spread across the keypad and avoid numerically obvious sequences. The same principle applies to both sides independently. See any-order codes explained.
The mechanical coding chamber is non-sequential - the buttons can be pressed in any order. Code 1234 works the same as 4321, 2143, or any other order. This is a feature that prevents code-spying by watching button press sequence. It also means double-pressing the same button adds nothing. When setting a code, choose buttons spread across the keypad and avoid numerically obvious sequences. The same principle applies to both sides independently. See any-order codes explained.
ECP Alternative - If On-Door Code Change Is Required
Borg produces a BL5101 ECP variant with on-door code change (Easicode Pro) and 100k+ cycle testing. This ECP version is not currently stocked separately on Gold Coast Smart Locks. If on-door code change in a knob/knob BTB format is essential, contact Terry's Locksmiths to discuss sourcing the ECP variant. For an on-door ECP in a BTB format with lever handles, see the BL5051MGECP. For a broader range comparison see Lockwood vs Borg vs Carbine.
Borg produces a BL5101 ECP variant with on-door code change (Easicode Pro) and 100k+ cycle testing. This ECP version is not currently stocked separately on Gold Coast Smart Locks. If on-door code change in a knob/knob BTB format is essential, contact Terry's Locksmiths to discuss sourcing the ECP variant. For an on-door ECP in a BTB format with lever handles, see the BL5051MGECP. For a broader range comparison see Lockwood vs Borg vs Carbine.
Borg Locks Warranty - 12 Months (Australia)
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty.
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty.
Purchased through Terry's Locksmiths? Contact Terry's Locksmiths first - we manage your warranty claim on your behalf. This warranty operates alongside your rights under the Australian Consumer Law.
What's In The Box - Borg BL5101SC / BL5101SS
Borg BL5000 Series non-ECP accessories packs - all contents of BL5101SC / BL5101SS
- Borg BL5101 outside knob keypad assembly (selected finish)
- Borg BL5101 inside knob keypad assembly (selected finish)
- 60mm heavy duty anti-thrust tubular latch (12.5mm latch bolt)
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- 4 x 16mm screws
- 2 x M4 x 40mm screws
- 2 x M4 x 50mm screws
- 2 x M4 x 60mm screws
- 2 x coded tumblers (red - for code length adjustment)
- 2 x non-coded tumblers (blue - for code length adjustment)
- 1 x tweezers (for tumbler code change)
- 1 x long hex wrench (Allen key)
- 2 x handle screw rubber grommets
- Installation instructions
A 70mm backset latch (BLL500070) is available separately if required. No batteries, wiring, or electronic components are included or required.
Borg BL5101 - Dimensions
Three dimensional drawings for the BL5101 are shown below: the BL5100 series external (keypad) unit engineering drawing, the BL5100 series internal (inside knob handle) engineering drawing, and the legacy line drawing from the original product listing. All measurements from Borg engineering drawings.
BL5100 Series - external keypad unit: 48mm W x 177mm H; 75mm depth; 26mm door-face projection; 59mm knob width
BL5100 Series - inside knob handle: 48mm W x 177mm H; 37mm depth; 18mm door-face projection; 59mm knob width
BL5101 - external keypad and inside knob handle legacy dimensional drawing (outside and inside are identical knob format)
Borg BL5000 Series - Product Brochure
BL5000 Series - full model range including BL5101 knob/knob back-to-back, all handle configurations, fire tested models and dimensions
Download PDF Resources - Borg BL5101
Borg BL5000 Series NON-ECP User Manual, Code Change Instructions and Cutting Template
Borg BL5100 ECP Series Brochure (BL5100 / BL5101 / BL5103 / BL5104 / BL5108 / BL5109 / BL5111 / BL5151 ECP range)
Borg BL5101 Drilling Template
Borg Lock Servicing and Maintenance Guide
Borg BL5000 Series NON-ECP User Manual, Code Change Instructions and Cutting Template
Borg BL5100 ECP Series Brochure (BL5100 / BL5101 / BL5103 / BL5104 / BL5108 / BL5109 / BL5111 / BL5151 ECP range)
Borg BL5101 Drilling Template
Borg Lock Servicing and Maintenance Guide
Borg BL5101 - In-Depth Questions and Answers
Extended Q&A for the Borg BL5101 non-ECP knob/knob back-to-back mechanical digital lock. Also see: Changing Codes on Mechanical Digital Locks, Why Double-Sided Locks Are a Smart Choice, Chapter 16: Mechanical Digital Locks.
Configuration and Selection
In what exact situation is a knob/knob BTB genuinely better than lever/lever?
The knob's 75mm depth vs the lever's 89mm depth is a 14mm difference. This matters when: (a) the door opens into a tight space and a lever would strike the adjacent wall or fixture; (b) a narrow corridor has both hands carrying items and a lever's radial sweep creates a collision risk; (c) the aesthetic preference is for a low-profile flush-looking hardware set. In all other situations, lever/lever (BL5051) is generally preferred - levers are easier to grip, especially in winter with cold hands or for users with grip limitations. Do not specify the BL5101 as a cost-saving measure; it is not a cheaper product than the BL5051. It is a specific format choice for a specific clearance problem.
The knob's 75mm depth vs the lever's 89mm depth is a 14mm difference. This matters when: (a) the door opens into a tight space and a lever would strike the adjacent wall or fixture; (b) a narrow corridor has both hands carrying items and a lever's radial sweep creates a collision risk; (c) the aesthetic preference is for a low-profile flush-looking hardware set. In all other situations, lever/lever (BL5051) is generally preferred - levers are easier to grip, especially in winter with cold hands or for users with grip limitations. Do not specify the BL5101 as a cost-saving measure; it is not a cheaper product than the BL5051. It is a specific format choice for a specific clearance problem.
Is there any difference in the operation between BL5101 and BL5151SC?
Yes. The BL5151SC is a hybrid: one side has a knob keypad, the other has a lever keypad. The BL5101 has a knob keypad on both sides - completely symmetric. If one side is used more frequently and ergonomic operation on that side is important, the BL5151SC gives a lever on the primary face. If both sides are used equally and compact symmetric operation is the goal, BL5101 is the correct choice.
Yes. The BL5151SC is a hybrid: one side has a knob keypad, the other has a lever keypad. The BL5101 has a knob keypad on both sides - completely symmetric. If one side is used more frequently and ergonomic operation on that side is important, the BL5151SC gives a lever on the primary face. If both sides are used equally and compact symmetric operation is the goal, BL5101 is the correct choice.
Code Change
I want to change the code after installation - does the door need to be open?
Yes. The keypad must be removed from the door to reposition the tumblers, so the door must be open for the keypad to be accessible from the back. Remove the relevant side's keypad (4 red screws), hold the C tumbler depressed throughout, reposition tumblers with tweezers, test the new code on the detached unit before reinstalling. Test again after refitting. Always keep the door open and verify the new code works at least five times before closing the door. See the door-open rule.
Yes. The keypad must be removed from the door to reposition the tumblers, so the door must be open for the keypad to be accessible from the back. Remove the relevant side's keypad (4 red screws), hold the C tumbler depressed throughout, reposition tumblers with tweezers, test the new code on the detached unit before reinstalling. Test again after refitting. Always keep the door open and verify the new code works at least five times before closing the door. See the door-open rule.
How do I identify the current code if I've forgotten it?
The Borg BL5000 NON-ECP User Manual describes the porthole method: a small inspection window on the coding chamber allows identifying which tumblers are coded (red) and which are non-coded (blue) by visual inspection without removing the lock. This can allow a locksmith to determine the existing code. If visual inspection is not conclusive, the keypad must be removed and the tumblers inspected directly. See the NON-ECP User Manual for the porthole identification method, or contact Terry's for locksmith assistance.
The Borg BL5000 NON-ECP User Manual describes the porthole method: a small inspection window on the coding chamber allows identifying which tumblers are coded (red) and which are non-coded (blue) by visual inspection without removing the lock. This can allow a locksmith to determine the existing code. If visual inspection is not conclusive, the keypad must be removed and the tumblers inspected directly. See the NON-ECP User Manual for the porthole identification method, or contact Terry's for locksmith assistance.
Installation
How does handing work on the BL5101 - which side is the outside?
The handing chart in the NON-ECP User Manual determines left or right hand from the outside of the door. For the BL5101 knob/knob configuration, the handing is set from one designated side (either can be the "outside"). Handing of the latch (left or right hand door) is reversible on site: remove the rubber grommet, unscrew the grub screw, lift the knob off the spindle, rotate 180 degrees, refit, retighten, replace grommet. Both knob units are reversed independently.
The handing chart in the NON-ECP User Manual determines left or right hand from the outside of the door. For the BL5101 knob/knob configuration, the handing is set from one designated side (either can be the "outside"). Handing of the latch (left or right hand door) is reversible on site: remove the rubber grommet, unscrew the grub screw, lift the knob off the spindle, rotate 180 degrees, refit, retighten, replace grommet. Both knob units are reversed independently.
My door is 55mm or 60mm thick - will the BL5101 fit?
The standard fixings supplied accommodate 35-54mm door thickness. Doors above 54mm may need an XL fixing kit (BLS275000 or equivalent) which can extend the range. Contact Terry's before ordering if your door is above 54mm. The spindle selection also becomes important: thicker doors need longer spindles. The supplied 90mm spindle covers most standard applications; if both 80mm and 90mm are insufficient, a longer spindle must be sourced. The general rule is door thickness + 30mm = minimum spindle length.
The standard fixings supplied accommodate 35-54mm door thickness. Doors above 54mm may need an XL fixing kit (BLS275000 or equivalent) which can extend the range. Contact Terry's before ordering if your door is above 54mm. The spindle selection also becomes important: thicker doors need longer spindles. The supplied 90mm spindle covers most standard applications; if both 80mm and 90mm are insufficient, a longer spindle must be sourced. The general rule is door thickness + 30mm = minimum spindle length.
Product Selection
Is there an ECP (Easicode Pro) version of the BL5101?
Yes. Borg produces a BL5101 ECP with on-door code change (10-second set), 100k+ cycle testing, and optional code change disabling plug. The ECP knob/knob BTB is not currently a separate listing on Gold Coast Smart Locks. The primary difference between BL5101 (this page) and BL5101 ECP is the code change method: this product requires keypad removal; the ECP version uses the phi-button on-door method. If on-door code change is a firm requirement, contact Terry's Locksmiths for ECP sourcing options, or consider a lever/lever ECP BTB such as the BL5051MGECP.
Yes. Borg produces a BL5101 ECP with on-door code change (10-second set), 100k+ cycle testing, and optional code change disabling plug. The ECP knob/knob BTB is not currently a separate listing on Gold Coast Smart Locks. The primary difference between BL5101 (this page) and BL5101 ECP is the code change method: this product requires keypad removal; the ECP version uses the phi-button on-door method. If on-door code change is a firm requirement, contact Terry's Locksmiths for ECP sourcing options, or consider a lever/lever ECP BTB such as the BL5051MGECP.
How does the BL5101 compare to the Carbine CDL7200LL-KDSC-HD (dual-keypad BCA lever)?
The Carbine CDL7200LL-KDSC-HD is a heavy duty, 100k+ cycle, dual BCA DDA lever both sides, with the AS1428.1 accessible lever format. It is designed for high-traffic commercial buildings and complies with DDA accessibility requirements. The BL5101 is a light to medium duty lock with a knob format that is not DDA compliant. If the application requires both-sided keypad access in a high-traffic or DDA-compliant environment, the Carbine is the correct choice. The BL5101 suits lighter applications where compact clearance is the primary driver. See our heavy duty commercial mech-digi guide.
The Carbine CDL7200LL-KDSC-HD is a heavy duty, 100k+ cycle, dual BCA DDA lever both sides, with the AS1428.1 accessible lever format. It is designed for high-traffic commercial buildings and complies with DDA accessibility requirements. The BL5101 is a light to medium duty lock with a knob format that is not DDA compliant. If the application requires both-sided keypad access in a high-traffic or DDA-compliant environment, the Carbine is the correct choice. The BL5101 suits lighter applications where compact clearance is the primary driver. See our heavy duty commercial mech-digi guide.
Borg Locks Warranty
Borg products sold in Australia are covered against mechanical defects in materials and workmanship under normal use and service. Warranty claims are handled by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries.
Warranty Summary
What the Warranty Covers
- Mechanical defects in materials and workmanship
- Defects arising under normal use and service conditions
- Repair or replacement of defective units at the discretion of the Australian distributor (LSC)
What the Warranty Does Not Cover
- Damage arising from misuse, vandalism, or abuse
- Damage resulting from improper installation
- Locks that have been dismantled - dismantling invalidates the warranty
- Normal wear and tear
- Cosmetic damage not affecting function
How to Make a Claim
For full returns and warranty claim procedures, visit our Returns & Warranty page - this is kept up to date and is the authoritative reference for current claim steps.
- Contact Terry's Tradies Pty Ltd first if you purchased through us or one of its associated trading names - we will assess the issue and manage the warranty process with LSC on your behalf. You do not need to contact LSC or Borg Locks UK directly.
- Have your proof of purchase ready (receipt or order confirmation).
- Warranty claims for Borg products in Australia are processed through LSC, the authorised Australian importer and distributor. Where an item is returned to LSC, freight charges must be prepaid and the item returned within the warranty period.
- If LSC finds the returned item to be defective, it will be repaired or replaced, and a detailed assessment report is provided to the customer after examination.
Australian Consumer Law
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
Confused? Overwhelmed? We get it.
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